Bulls director of rugby Jake White believes form will go out the window when his side take on the Stormers in their United Rugby Championship quarter-final in Cape Town on Saturday.
Glasgow's South African coach Franco Smith was over the moon after seeing his side reach the Challenge Cup final with a 35-17 win over rivals Scarlets in Llanelli.
The Bulls are facing an uncertain week ahead as they await updates on the condition of their flyhalf Johan Goosen.
Siya Kolisi has opted for surgery to treat the knee he injured playing for the Sharks against Munster in Durban last weekend.
Sharks Director of Rugby Neil Powell says his charges will need to be at their peak for the full 80 minutes against Leinster in the URC quarterfinals.
Leinster may be leading the charge for the URC title this season, but their road into both the European and URC finals is beset with pitfalls.